Configuration data migration for distributed micro service-based network applications

A method for migrating configuration data for a network device, the method comprising:

• storing, on one or more computer-readable media of the network device, a plurality of legacy data repositories comprising configuration data for the network device in key-value pair format that specifies a plurality of parameters and corresponding values for operation of the network device;
• storing a plurality of hierarchical configuration data models for the network device, wherein each of the hierarchical configuration data models includes a plurality of nodes arranged in a hierarchical organization having a root node and a plurality of leaf nodes, wherein each of the plurality of nodes is configured to store a set of configuration data parameters for the network device, and wherein one or more of the plurality of nodes includes a plurality of external references to respective parameters of the plurality of parameters stored within the plurality of legacy data repositories;
• storing, with at least one node of the plurality of nodes that includes one of the plurality of external references, meta data specifying at least one data transformation operation to be performed on one or more of the respective parameters stored external to the hierarchical configuration data models when migrating the hierarchical configuration data models to include the respective parameters;
• generating, from the plurality of hierarchical configuration data models, a schema file that aggregates the plurality of nodes of the plurality of hierarchical configuration data models into the hierarchical organization and includes, within the plurality of nodes, the plurality of external references to the plurality of parameters of the plurality of legacy data repositories;
• generating a first data migration map that specifies each of the key-value pairs of the parameters and the corresponding values of the plurality of legacy data repositories;
• generating a second data migration map from the schema file, wherein the second configuration map specifies (i) each of the plurality of external references within the plurality of hierarchical configuration data models to the plurality of parameters stored within the plurality of legacy data repositories, and (ii) for each external reference of the plurality of external references, a path to a respective node of the plurality of nodes within the plurality of hierarchical configuration data models that contained the plurality of external references;
• and
• traversing the first data migration map and, for each key-value pair of the plurality of parameters and the corresponding values of first data migration map, (i) performing any data transformation operation specified by the metadata for the parameter of the key-value pair, and (ii) writing the parameter of the key-value pair to the plurality of hierarchical configuration data models according to the path specified by the second data migration map for the parameter.

A network device comprising:

• one or more computer-readable media storing data comprising:
• a plurality of legacy data repositories comprising configuration data for the network device in key-value pair format that specifies a plurality of parameters and corresponding values for operation of the network device;
• a hierarchical configuration data model having a plurality of nodes arranged in a hierarchical organization having a root node and a plurality of leaf nodes, wherein each of the plurality of nodes of the hierarchical configuration data model is configured to store a set of configuration data parameters for the network device, and wherein one or more of the plurality of nodes includes a plurality of external references to respective parameters of the plurality of parameters stored within the plurality of legacy data repositories;
• and
• processing circuitry configured to perform a migration of the configuration data for the network device by, for each of the plurality of external references defined within the plurality of nodes of the hierarchical configuration data model, retrieving, with a software upgrade service executed by a processor, the referenced parameter stored within the legacy data repositories and updating a respective node of the plurality of nodes within the configuration hierarchical data model to store the referenced parameter.